I've mentioned before that writing is my outlet. It is what helps me to remain sane, even though I rarely get out and some days my kids are the only people I talk to. If I didn't write I would have to have another outlet.
Maybe I'd take up pottery. I've taken a few pottery classes, and even though I am incapable of making any piece taller that 5 inches, I like it. I believe in getting my hands dirty--it's therapeutic. I might also get more involved in vegetable gardening (sometimes I sound like an old woman even to myself!) We had a fun little vegetable garden this year, but I didn't spend enough time on it--writing was always higher priority (as my frostbitten melons and tomatoes can attest).
What would you do with your free time if you didn't write?